ORA-31693 ORA-02354: error in exporting/importing data ORA-01555: snapshot too old

Error:

ORA-31693: Table data object "MIS"."MASTER_MISDB" failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-01555: snapshot too old: rollback segment number 4 with name "_SYSSMU4_4250244621$" too small


[oracle@said]$ sqlplus

SQL*Plus: Release 12.1.0.2.0 Production on Mon Nov 26 10:15:18 2018

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

Enter user-name: /as sysdba

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> show parameter undo

NAME      TYPE VALUE
------------------------------------ ----------- ------------------------------
temp_undo_enabled      boolean FALSE
undo_management      string AUTO
undo_retention      integer 7200
undo_tablespace      string UNDOTBS1
SQL>

SQL> select max(maxquerylen) from v$undostat;

MAX(MAXQUERYLEN)
----------------
  204662
 
Solution:
 
1. Modify the current UNDO_RETENTION for the database:
 

SQL> ALTER SYSTEM SET UNDO_RETENTION = 205000 scope=both sid='*';

SQL> show parameter undo

NAME      TYPE VALUE
------------------------------------ ----------- ------------------------------
temp_undo_enabled      boolean FALSE
undo_management      string AUTO
undo_retention      integer 205000
undo_tablespace      string UNDOTBS1

2. Perform the export again.

ORA-31693: Table data object "SCHEMA"."TABLE" failed to load/unload and is being skipped due to error:

Error:

ORA-31693: Table data object ""."" failed to load/unload and is being skipped due to error:

Reason: 

The error is showing due to the backup dump file is not accessible from the the second node in the RAC


Solution:

Following example will help to resolve the issue.

expdp username/passwd tables=schema.table dumpfile=backup.dmp logfile=backup.log cluster=N

or

Shutdown Database on second node and execute the following command


expdp username/passwd tables=schema.table dumpfile=backup.dmp logfile=backup.lo